in cairo. the u.s. embassy there is closed. no one is being allowed in or out as we speak. >> embassy officials say protesters are blocking the entrance and clashes are happening near nearby. reza sayah is nearby for us. what's happening? >> reporter: there is no indication protesters are targeting the u.s. em wibassy b it was closed as a precaution. these are protesters who clashed with police. these are the trouble-making elements, the teenagers, young men, the 20-somethings who for the past four days vo thrown red sox, debris, molotov cocktails at police. police responded by firing teargas, stun grenades. some police officers have been throwing rocks as well. some of the clashes have been inching toward the assembly which is a couple of blocks from tahrir square. four hours ago the embassy shut its doors saying no one would come in or leave until further notice. more demonstrations scheduled in the days ahead in tahrir square. the embassy announcing that services for american citizens in cairo will be cancelled until further notice. >> this is all over president morsy's power grab.